i want to start with dzhokhar tsarnaev. do we know specifically beyond serious condition how he's doing and how much talking he's doing? >> well, very little talking because of his throat wound. serious but stable condition is the way they describe it. we have been told that they are asking him some questions during brief periods and that he is giving them answers in writing. what he's saying we don't know. we can assume they are asking him about other threats. whether they had other plotters working with them or whether there were other explosives out there. that's the kind of questions they can ask during this initial period before they have to give him a miranda warning. >> which deals with public security threat. do investigators have a good handle, pete, on how big an arsenal they had? >> you know, we have heard conflicting things about this. we know they had a lot of finished bombs because they threw a lot of them out of the car as the police were chasing them thursday night, friday morning. they were throwing these l